How smooth is the 6L90 transmission. I've got a 16 camaro ss and the A8 is the worst transmission GM has made and has given me nothing but trouble. I'm looking at 5th gen ZL1's but just wondering how the 6L90 is in daily driving. Once you modify the car does it still shift good or will it have issues. Just curious. Thanks in advance

How smooth is the 6L90 transmission. I've got a 16 camaro ss and the A8 is the worst transmission GM has made and has given me nothing but trouble. I'm looking at 5th gen ZL1's but just wondering how the 6L90 is in daily driving. Once you modify the car does it still shift good or will it have issues. Just curious. Thanks in advance

I've had my 2013 ZL1 for over two years with mods, cam, headers, etc., and been happy with it. This week I had a FTI 3600 stall put in and ID850 injectors and tune, and wow, i REALLY like it.

If you or your tuner know what you're doing it is a great trans but a bad tune will trash it very quickly...and its a lot different than tuning a 4l80. Leave all or most of the torque management and make subtle time and pressure changes and it will take a lot of power.

I've had it flushed 3 times, converter changed, and reprogrammed. It's just inherent to the A8. They ever had us switch to the new Dexron HP fluid and that didn't help anything. It's just a pretty lackluster transmission. Looks like the 2019 with have the A10 which has proven to be a much better transmission.